San Antonio’s Blithe kicks off “Murmur” like a less-than well-oiled industrial mess. The drums smack as a fuzz-choked bassline grips speakers in a vice-like hold dripping wet with noise. The quintet pervades the same sonic ground as a young Trent Reznor might, assuring the listener that their affected, booming heart — one linked up to mean, chiming synth ripples and equally anguished guitars — isn’t a strong one. Perhaps this is because the confidence which pummels through this track isn’t due to any vocal thrust in a positive direction. It’s in how intelligently Blithe’s post-punk shrapnel smarts in one’s ears after the song’s near-three minutes have elapsed.